Zen, a girl born from an affair between two members of rival crime syndicates, lives in recluse with her mother. She learns how to fight by absorbing martial arts skills from what she sees on TV and from the Muay Thai boxing school next to her home. When Zen's mother falls ill she sets out on an ambitious quest to settle the debts still owed from her mother's gangster days, which leads her to confrontations with dangerous criminals, as well as an unexpected encounter with her father.
Rated R for violence throughout, and brief sexuality/nudity.